Baltimore County fire officials are visiting 11 county marinas during the holiday weekend to educate boaters on the danger of carbon monoxide ? a colorless, odorless gas that killed three aboard a cabin cruiser two weeks ago in Bowleys Quarters. Firefighters launched the campaign Wednesday morning at Parkside Marina, where two women and a man were found dead June 18 in a 30-foot cruiser that wasn?t equipped with a carbon monoxide detector ? a common oversight for even the most safety-conscious boaters, officials said.

“It?s a small piece of life insurance,” Capt. Lawrence Majchrzak said. “You think about it for your home but not your boat because you assume you are outdoors. But all it takes is a little bit to build up.”